Suppose 3 neutrons are released by an atom of u-235 in the first stage of a fission chain reaction. each of these neutrons has enough energy to cause another fission reaction in another nucleus of u-235, releasing more neutrons. and if all of those 2nd stage neutrons cause other nuclei to fission in a 3rd stage, how many total u-235 atoms will have undergone fission after these 3 stages of the chain reaction?
a. 27
b. 9
c. 11
d. 12

Apossible explanation for a set of facts that can be tested by further investigation is called

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p